Improvement in wood pavement



UNITED STATES PATENT OFFICE.

A. WARNER PLATT, OF NEW YORK, N. Y.

iMPRovEMENT IN wooo PAVEMENT.

Specification forming part of Letters Patent No. 100,554, dated March 8, 1870.

view of the same on areduced scale.` Fig. 3

represents a view in perspective of one of said blocks.- 1 i Similar letters of reference indicate corresponding parts. K y

My improvement consists in a novel construction of the blocks of which the pavement is composed by making oblique incisions in or across t'heirupper surfaces, alike to provide `for expansion and contraction ofthe blocks in various directions, as well as, by the filling in of said incisions with tar and gravel `or "othersuitable material, to form a sure foothold for biases, such incisions being solarranged that thc placing of the blocks, thoughv done promiscuously, keeps them out of line, or causes them t break joint, whereby the foot-hold is improved.

The blocks may either be keyed together or not when in place, and may rest upon any suitable foundation, but are here shown as laid upon planks wliich3"""run parallel with the street,` and rest upon boards or timbers arranged at anysuitable distance apart, crosswise of the street, from curb to curb.

In the accompanying drawing, A A represent the blocks, of any suitable size, and a a the incisions made in or across their upper surfaces, and which are arranged in oblique relation to the sides of the block, so4 as to provide for expansion and contraction of the block both in direction of its length and breadth v equally as well, and with much less expense, as cross-cuts at right angles to each other, inasmuch as a single cut under` the oblique 4arrangement answers instead of two cuts under a. right-angled disposition or arrangement.

Each/block may have any number of such oblique incisions a, a, that should be of sufficient depth and width not only to provide for all probable expansion and contraction of the wood, but to form good holding-spaces for tar and gravel or other suitable tillin g, to improve the foothold of the general surface; and it is desirable that the incisions`be so arranged that, on putting the blocks together promiscuonsly, they break joint or line so far as regards said incisions, as well as regards the blocks themselves.

I am aware of the patent issued to H. G. McGonegal, January 19, 1869, and disclaim everythingtherein set forth.

What is here claimed, and desired to be secured by Letters Patent, is-

The blocks A A, made with oblique incisions a a in and across their upper surfaces, substantially as and for the purposes herein set forth.

' A. WARNER PLATI.

Witnesses:

FRED. HAYNES, M. J. SHANLYS. 

